solve each system of eaquasions x+4y=4 -x+2y=8​

Answers

Answer 1
x + 4y = 4
-x + 2y = 8


x + 4y - x + 2y = 4 + 8

6y = 12

y = 2


x + 4(2) = 4
x + 8 = 4
x = -4

(x,y)
(-4,2)
Answer 2

Answer:

(-4, 2)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right  

Distributive Property

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Algebra I

Terms/CoefficientsCoordinates (x, y)Solving systems of equations using systems

Step-by-step explanation:

Step 1: Define Systems

x + 4y = 4

-x + 2y = 8

Step 2: Rewrite Systems

x + 4y = 4

[Subtraction Property of Equality] Subtract 4y on both sides:                    x = 4 - 4y

Step 3: Redefine Systems

x = 4 - 4y

-x + 2y = 8

Step 4: Solve for y

Substitution

Substitute in x:                                                                                                 -(4 - 4y) + 2y = 8[Distributive Property] Distribute negative:                                                   -4 + 4y + 2y = 8Combine like terms:                                                                                        -4 + 6y = 8[Addition Property of Equality] Add 4 on both sides:                                    6y = 12[Division Property of Equality] Divide 6 on both sides:                                y = 2

Step 5: Solve for x

Define original equation:                                                                                x + 4y = 4Substitute in y:                                                                                                 x + 4(2) = 4Multiply:                                                                                                            x + 8 = 4[Subtraction Property of Equality] Subtract 8 on both sides:                       x = -4

Related Questions

At 6:00 A.M., the temperature was 10º below zero. During the day, the temperature rose an average of 2º per hour. If h represents the number of hours since 6:00 A.M., which equation represents the temperature T?

Answers

Answer:

10+2h=T

hope this helps :)

Cool down tickets, a school is holding a carnival and hopes to raise $500. Child tickets cost $3 and adult tickets cost $5. If the school sells x child tickets and y adults, then the equation 3x + 5y=500 expresses the fact that school raised exactly $500 from ticket sales. Solve thevequation for x. 2. Explain whenot might be helpful to resrite the equation this way.

Answers

Answer:

x = 1/3(500 + 5y)

Step-by-step explanation:

Given that:

x child tickets for $3

y adult tickets for $5

3x + 5y = 500

To solve for x

3x = 500 + 5y

Divide through by 3

3x /3 = 500/3 + 5y/3

x = 1/3(500) + 1/3(5y)

x = 1/3(500 + 5y)

2.)

If the total number of tickets sold was made available, then a more direct solution would have been obtainable as we can have two different equations;

One for the total number of ticket sales and the other of the total revenue from ticket sales.

find the time it would take to triple an initial deposit of $2,000 at an interest rate of 8%, compounded semi-annually
(rounded to the nearest whole year)

Answers

it’s is 250 I hope I help have a nice night

Find the slope between (1,-19) and (-2,7)

Answers

Answer
4



Explanation
(1,19) (-2,7)
7-19=-12
-2-1=-3
The divide -12 and -3 and you get 4
Hope this helps

Answer:

m= -26/3  

Step-by-step explanation:

I used an app called  "M a t h w a y " (with no spaces) you should use it

it is very helpful!

2. Which of the following are solutions to - 2.7 + x = - 3.5?

Answers

Step-by-step explanation:

x = -4/5 = -0.8

Answer:

x = −0.8

Step-by-step explanation:

−2.7 + x = −3.5

1.) Simplify both sides of the equation

x − 2.7 = −3.5

2.) Add 2.7 to both sides

x − 2.7 + 2.7 = −3.5 + 2.7

AND BAYUM...

x = −0.8

~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hope I helped!!!

GL :)

The solution of –2x + 13 < 9 is ______

Answers

Answer:

-2x + 13 < 9

or, -2x < 9-13

or, -2x < -4

or, x > -4/-2

or, x > 2

Hope you got your answer.

Answer:

x>2

Step-by-step explanation:

-2x<9-13

-2x<-4

x>2

x>2

Which whole numbers does the square root of 69 falls in between?

Answers

The square root of 69 is approximately 8.3066, so it’s between 8 and 9.

Write the equations of the line that passes through the point 4,3) and is perpendicular to the line y=2x−4 . Write the equation in slope-intercept form.

Answers

Answer:

        y = -¹/₂x + 5

Step-by-step explanation:

The product of slopes of perpendicular lines is -1

y = 2x − 4  ⇒   m₁ = 2

m₁m₂ = -1

2m₂ = -1

m₂ = -¹/₂

The Point-Slope form of equation of a line with slope of "m" and passing through point (x₁, y₁) is:  y - y₁ = m(x - x₁)

m = -¹/₂

(4, 3)  ⇒  x₁ = 4,  y₁ = 3

So the equation in point-slope form:

                                                  y - 3 = -¹/₂(x - 4)

Therefore:

y - 3 = -¹/₂x + 2

y = -¹/₂x + 2 + 3

y = -¹/₂x + 5

[tex](9x2-2x+1)-(3x2+5x-8)[/tex]

Answers

Answer:

(6x² - 7x + 9)

Step-by-step explanation:

Given:

(9x² - 2x + 1) - (3x² + 5x - 8)

Find:

Value of equation

Computation:

(9x² - 2x + 1) - (3x² + 5x - 8)

(9x² - 2x + 1 - 3x² - 5x + 8)

(6x² - 7x + 9)

find the center of the circle given the question (×-2)²+(y+6)²=10? A. (2,-6) B. (-2,6) C. (2,6) D. (-2,-6)​

Answers

Answer:

A. (2,-6)

Step-by-step explanation:

(×-2)²+(y+6)²=10

Equating it with

(×-h)²+(y -k)²=10

h = 2 & k = - 6

(h, k) = (2, - 6)

The McMillians noticed that the amount of natural gas they use at their house each month is related to the average monthly temperature, as shown in this scatter plot. The slope of the line best fit -2.5 therms per degree. Which explains how the slope can be interpreted?
(PLEASE HELP ME, i don’t understand it!)

Answers

Answer:

Its B

Step-by-step explanation:

For each increase of 10° the amount of gas used is about 25 therms less

Deion left his house and drove to the store. He stopped and went inside. From there, he drove in the same direction until he got to the bank. He stopped and went inside the bank. Then he drove home. The graph below shows the number of blocks away from home Deion is xx minutes after he left his house, until he got back home.
\text{How many blocks is it from Deion's house to the bank?}
How many blocks is it from Deion’s house to the bank?

Answers

Answer:

I dont know if this is still helpful but the answer is 14 blocks

Step-by-step explanation:

The box plot below represents the ages of campers at a summer camp. What can be interpreted from this box plot?

Answers

Answer:

The box plot below represents the ages of campers at a summer camp. What can be interpreted from this box plot? A. It can be interpreted that about 50 percent of the campers are 8 years of age or younger.

A square has diagonal length 13 m. What is the side length of the square, to the
nearest hundredth of a meter?

Answers

Twelveeeeeee your welcomeee

Translate the following verbal expression into an algebraic expression.

“Three times the sum of a number and seven”

Answers

Answer:

3 * (x + 7)

Step-by-step explanation:

Mark number as x

Then the sum of a number and seven is x + 7

Three times x + 7 can be written as

3 * (x + 7)

Parentheses mean that we first add x and 7 and then multiply their sum by 3

Alternatively you can write it as 3x + 21, since

3 * (x + 7) = 3 * x + 3 * 7 = 3x + 21

Una pirámide de base cuadrada se corta con un plano paralelo a la base por la mitad de la altura de la pirámide, obteniendo una pirámide más pequeña y un tronco de pirámide. ¿Cuántas veces es más grande el volumen del tronco con respecto al volumen de la pirámide pequeña?

Answers

Answer: what does this say?

Step-by-step explanation:

Select the equivalent expression.
3-5 = ?

Answers

-2 !!!!!!!!!!!!!!!!!!!!!!!

Apply the distributive property to the expression 9(6m-4n). DO NOT SYMPLIFY.

Answers

Answer:

54m-36n

Step-by-step explanation:

9·6m= 54m

9·(-4n)= -36n

54m-36n

The ages, in years, of a group of students are given in the box. Work out the mode.11 11 12 13 13 14 15 15 15 15

Answers

Answer:  Mode = 15

Explanation:

The mode is the most frequent value. We see that "15" shows up a total of 4 times, which is the most of the the unique values {11, 12, 13, 14, 15}.

Helia invested 4000 AED for 3 years with a compound interest rate of 1.5%, Calculate the worth of her investment at the end of this time period

Answers

4000(1+1.5\100)to the power of 3

Just give me the answer

Answers

Answer:

y^6 is the simplest form

Answer:

y=6

Step-by-step explanation:

THATS KHANACADEMY RIGHT LOLLL

Find the value of x. Round your answer to the nearest whole degree. ​

Answers

Answer:

68°

Step-by-step explanation:

arctan(x) = 5/2

3 1/2 + 1 1/3 = ??
Simply your answer and show ur work

Answers

Answer:

29/6

Step-by-step explanation:

Answer: 29/6 or 4 5/6

Step-by-step explanation:

3+1 = 4

Find a common denominator between 1/2 and 1/3

1/2 becomes 3/6 and 1/3 becomes 2/6

2/6 + 3/6 = 5/6

Now add the 4 back:

4 5/6

find the binomial which is a common factor of:-
plz ans it fast...

Answers

Step-by-step explanation:

step 1. why are you in a hurry?

step 2. a binomial that is a common factor of 121 - 25x^2 and 25x^2 + 55x + 121.

step 3. the factors. of 121 - 25x^2 are (11 - 5x)(11 + 5x).

step 4. the factors of 25x^2 + 55x + 121 are (5x + 11)(5x + 11).

step 5. the common factor is 5x + 11.

Please answer the pictures provided

Answers

Answer:

-6-3

Step-by-step explanation:

How do I know if it is sss, sad, asa, or aas?

Answers

i have attached a image which may help u <3

Four friends go out to lunch together. Mike orders a personal pizza with 2 toppings for $7.00. Dustin orders a personal pizza with 5 toppings for $9.25. Lucas orders a calzone with 1 topping for $5.75. Will orders a calzone with 4 toppings for $8.75. For what number of toppings is the price of a personal pizza the same as a calzone?

Answers

Answer:

Step-by-step explanation:

Four friends go out to lunch together.

For what number of toppings is the price of a personal pizza the same as a calzone?

Let us represent the number of toppings as x

We need to know the price of a personal pizza and the price of a calzone

Mike orders a personal pizza with 2 toppings for $7.00.

2x = $7

x = $7/2

x = $3.50

Dustin orders a personal pizza with 5 toppings for $9.25.

5x = $9.25

x = $9.25/5

x = $1.85

Lucas orders a calzone with 1 topping for $5.75.

x = $5.75

Will orders a calzone with 4 toppings for $8.75.

4x = 8.75

x = 8.75/4

x =2.1875

Describe the differences in the graphs of linear functions vs. exponential functions.

A. Linear functions have a constant slope, while exponential functions start flat and get steeper.

B. Linear functions cross the y-axis above exponential functions.

C. Linear functions slope down, while exponential functions slope up.

D. There is no
differhoice.

I’ll give brainiest

Answers

Answer:

It's A.

(Just finished the quiz) <3

The differences in the graphs of linear functions vs. exponential functions

is, A. Linear functions have a constant slope, while exponential functions start flat and get steeper.

What is a linear equation?

An equation of degree one is known as a linear equation.

A linear equation of two variables can be represented by ax + by = c.

A function is an exponential function when the exponent is the variable.

The difference between a linear function and an exponential function is,

while exponential functions begin flat and gradually steepen, linear functions have a constant slope.

learn more about exponential functions here :

https://brainly.com/question/12260956

#SPJ2

8 + 3n ≥ 38 do yall know??? solve please

Answers

Answer:

n ≥ 10

Step-by-step explanation:

Given

8 + 3n ≥ 38 ( subtract 8 from both sides )

3n ≥ 30 ( divide both sides by 3 )

n ≥ 10

Spencer and Hanna buy a pizza for $18 that is half pepperoni and half veggie. They cut the pizza into 8 slices.

If Spencer likes veggie four times as much as pepperoni, what is the value of a slice that is all veggie?

Answers

Answer:

they needa buy me a beer

Step-by-step explanation:

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